338 
[December 
m, is composed of two generically inseparable species {L. cymatopho- 
roides and L. expultrix) differing from the rest of the family by the 
ornamentation and proportionate length of the % abdomen and these 
characters, as well as those I have elsewhere indicated, will, in my 
opinion, prevent its being united with Thyatyra^ from which it also 
differs in the minor character of wing ornamentation, forming, in its 
present position, a natural transition between Leptina and Gonophora. 
The following is a list of the described North American species of 
Cymatophorina; the synonyms are in Italics^ and the references pur¬ 
posely omitted. The species marked with a * are represented in the 
Cabinet of this Society. 
CYMATOPHOKA Treits. 
caniplaga Walker. 
LEPTINA Guen, 
* dormitans Guenee. 
ophthalmica Guenee. 
latebricola Grote. 
Doubledayi Guenee. 
LACINIA Grote. 
* cymatophoroides Guenee. 
NOCTUINA H-S. 
PHILOCHRYSA nov. gen. 
Antennae short, stout, simple; head depressed; eyes large; pro¬ 
boscis short, slender; palpi depressed, short, not exceeding the head, 
well clothed with hair, terminal joint well defined, pointed; thorax 
convex, stout; abdomen stout, hardly exceeding the posterior wings; 
not crested nor tufted on the sides, anal segment moderately tufted in 
the % . Anterior wings straight along the costa; apex prolonged, 
rounded; exterior margin rounded, very oblique; median nervure 
throwing off 1st, 2nd, 3rd and 4th inferior nervules, 1st and 2nd 
springing from almost the same place; costal and subcostal nervures 
in the posterior wings diverging from a common stem near the base of 
the wing. 
This generic description is drawn from two % individuals, one of 
which, in good condition, was taken in Pennsylvania and is now in the 
Collection of this Society; the other, in indifferent preservation, was 
kindly lent me by Dr. Morris of Baltimore, and reported to him as 
having been taken in the vicinity of Washington, D. C. The single 
* expultrix Grote. 
9 cymatophoroides Guenee. 
var /?. cymatophoroides Walker. 
GONOPHORA Bruand. 
scripta Gosse. 
ahrasa Guenee. 
THYATYRA Ochs. 
- pudens Guenee. 
